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Environmental forcing on jellyfish communities in a small temperate estuary
Ana Lígia Primo1, Sónia C Marques, Joana Falcão
1CFE - Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Apartado 3046, 3001-401 Coimbra, Portugal. ana.primo@student.zoo.uc.pt
Marine Environmental Research
|July 10, 2012
Summary
Jellyfish blooms in the Mondego estuary increased since 2005, driven by temperature, salinity, and other environmental factors. This research enhances understanding of gelatinous plankton in temperate estuaries.
Area of Science:
- Marine biology
- Estuarine ecology
- Jellyfish population dynamics
Background:
- Jellyfish blooms are increasing globally.
- Understanding environmental drivers is crucial for predicting bloom dynamics.
- Estuaries are sensitive ecosystems influenced by multiple factors.
Purpose of the Study:
- To evaluate the impact of biological, hydrodynamic, and climatic variables on the Mondego estuary jellyfish community.
- To identify key environmental factors influencing jellyfish density and interannual variability.
- To contribute to the knowledge of gelatinous plankton in temperate estuaries.
Main Methods:
- Plankton samples were collected from the downstream Mondego estuary between 2003 and 2010.
- Statistical analysis was used to determine the influence of environmental variables on jellyfish assemblages.
- Key species identified included Muggiaea atlantica and Diphyes spp.
Main Results:
- Jellyfish density increased since 2005, with higher concentrations observed in summer.
- Acartia clausi, estuarine temperature, and salinity were identified as primary drivers of community structure.
- Chlorophyll a, salinity, runoff, and sea surface temperature (SST) influenced siphonophore interannual variability.
Conclusions:
- Temperature directly and indirectly affects jellyfish community structure and bloom fluctuations.
- Environmental factors play a significant role in shaping jellyfish populations in the Mondego estuary.
- This study provides valuable insights into gelatinous plankton dynamics in small temperate estuaries.
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